Garnet-cylinder



H. V. COULSTON.

' GARNET CYLINDER.

mmcmou man MAR. 12. 99.

Patnted July 13, 1920.

m Jm mmmuu UNITED STATES PATENT OFFICE.

HERBERT V. COULSTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SMITH AND FURBUSH MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A 003,..

PORATION OF PENNSYLVANIA.

GARNET-CYLINDER.

Application filed March 12, 191 3.

TO all whom it may camera:

Be it known that I, HERBERT V. COULSTON, a citizen of the United States, residing in Philadelphia, Pennsylvania, have nvented certain lmprovements in Garnet-Cylinders, of which the following is a specification.

One object of my invention is to improve the Construction of a garnet cylinder by welding the convolutions of the toothed wire together, or welding a series of assembled rings together, to form a cylinder and thus dispense with the groovng of the supporting cylinder.

A further object of the inventien is to .make a toothed cylinder from the wire itself which can be moved, when necessary, from a supporting cylinder and replaced by a like toothcd cylinder.

Heretofore, it has been the usual practice to cut a spiral groove in a cast metal cylinder, the convolutions of the groove being spaced a given distance apart. Then a strip of fiat wire having teeth is forced into the groove and held therein by any suitable means. When the teeth begin to wear the entire cylinder has to be sent to the factory to have the toothed strip removed and another strip driven in its place.

iv iy invention, all. that is necessary is to discard the cylinder consisting of the toothed strip and to substitute a cylinder of like character, which can be kept in stock.

In the accompanying drawings:

Figure 1 is a side View of a garnet cylinder made in accordance with my invention;

Fig. 2 is an enlarged View of a portion of the cylinder, showing the method of assembling the toothed strip on a supporting cylinder before welding;

Fig. 3 is a sectional View of a cylinder consisting of the helically wound strip in which the convolutions are welded together;

Fig. 4 is an enlarged perspective view of a section of the toothed strip;

Fig. 5 is -a View of a portion of the toothed cylinder consisting of a series of convolutions of the strip welded together;

F ig. 6 is a sectional view showing one method of retaining the toothed cylinder to the main supporting cylinder;

Fig. 7 is a View showing a separating ring and toothed wire;

Fig. 8 is a view of a modification in which Specficaton of Letters Patent.

Patented July 1331920.

Serial No. 282346.

a thin sheet is welded to the toothed wire to form a cylinder, and

Fig. 9 is a` modification in which the toothed rings are used lifeferring to Fig. a l is a wire flattened and having teeth 2 of any shape desired, according to the character of the material to be treated. In the present instance, the wire has an oifset 3 at one side, which spaces the convolutions of the wire a given distance apart. The wire is coiled tightly upon a forming cylinder 4: nounted on a suitable shaft This may be the final supporting cylinder, or may be merely a temporary support on which the wire is coiled. After the wire is coiled, as in Fig. 2, the convolutions of the wire are welded together at the base by the use of a welding machine, preferably of the roller type, so that, as the cylinder turns, the current will pass through the convolutions of the wire from one pole to the other of the machine, immediately bringing the material of the wire into a welding heat and as pressure is applied causing the convolutiens to be firmly welded together. After the convolutions of the strip are welded, if it be desired to remove the cylinder thus formed from the support ing cylnder, this can be accomplished in any suitable manner, and a cylinder made entirely of he coiied strip, as shown in Fig. 3, can be placed on a cylinder of a garnet machine. This cylinder is indicated at G, and, in this instance, its periphery is slightly tapered from one end to the other and a tapered, split sleeve 'I is introduced between the 'cylinder 6 and the toothed cylinder. This tapered sleeve can be held by bolts, or other suitable fastenings, so as to retain the toothed cylinder' rinly onto the supporting :ylin.ler. Other means of fastening the toethed cylinder to the main cylinder may be res'rted to without departing from the essential features of the invention.

In some instances, the wire may be coiled directly upon the supporting cylinder and welder. This is practical where the cylinders can be bodily transferred and where the distance between the factor-y and the ill in which the machine is used is comparatively short. here the distance between the factory and the mill 'is considerable, then the question of freight enters into the situation so ,that it mey be prefereble to ship the toothed cylinder and allow the factory employees to remove the worn, toothed cylinder and slip the new cylinder inplace. t e

t Will be understood that While I have shown e particular form of Wire and teeth of a pecuhar ch racter, the shepe of 'the' teeth' may he varied andthe shape of the wire may be modified. nfact, n some 1nstances, the Separator B Fg. 7, may he *ma-de of e separate piece from the toothed wire l andithe two ndenendent'elements may be coiled around the Lorming cylinder and welded together.

In some instances, e sheet of metal 8 may' 9, as Well as the contnuous helical toothed structure shown in Fig. 3.

I claim: u

l. A cylinder of a gernet machine made 'of Wire having teeth and having :in ofiset portion at'one side ofthe teeth, the wire being arranged in hehca form With the convolutons close together, one convolution being attached to the other by spot welding,

forming an integral structure.

2. i& garnet cyhnder ormeo OL hehcaly Wound toothed wre, the wire nevng :in offset portion at the side of the teeth, and the' convolutons of the W1re being spot welded together to form en integral structure, the

spote being distent one from the other so that the welding Will not effects the tempcr of the Wir-e. i

3. The combinetion in a garnetmaehine, of a, supporting cyhnder; toothed Wire hm ing an ofi'set portion at the side of the teeth Wound upon said supporting cylinder, the convolutions ofthe Wire being spot welded together and to the supporting cylinder. i

In Witness Whereo' I afiix my si nature.

HERBERT V. ooUieroN; 

